What does the future hold? Our enduring fascination with predicting the future is reflected on the silver screen, as excitement builds over the Blade Runner sequel. We continue being mesmerized by ancient prophecies, such as Nostradamus' Quatrains. And we certainly pay very well to pundits, economists, and intelligence analysts who try to predict coming social, economic, and political events. Unfortunately, this abiding interest in prediction has not translated into the ability to forecast future events with much accuracy.